We directly use WebCore::AudioTrackPrivate and WebCore::VideoTrackPrivate in RemoteSourceBufferProxy.cpp, but we don't import their respective WebCore headers.
Created attachment 440447 [details] Patch
Committed r283681 (242619@main): <https://commits.webkit.org/242619@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 440447 [details].
<rdar://problem/83959014>